JP6078579B2 - Insert-molded vehicle part and method of manufacturing insert-molded vehicle part - Google Patents

Insert-molded vehicle part and method of manufacturing insert-molded vehicle part Download PDF

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JP6078579B2
JP6078579B2 JP2015092332A JP2015092332A JP6078579B2 JP 6078579 B2 JP6078579 B2 JP 6078579B2 JP 2015092332 A JP2015092332 A JP 2015092332A JP 2015092332 A JP2015092332 A JP 2015092332A JP 6078579 B2 JP6078579 B2 JP 6078579B2
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base member
opening
insert
covering
molding
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JP2016210001A (en
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哲 堀内
哲 堀内
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Honda Motor Co Ltd
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Honda Motor Co Ltd
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Priority to EP16161160.3A priority patent/EP3088155B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14336—Coating a portion of the article, e.g. the edge of the article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14065—Positioning or centering articles in the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N3/00—Arrangements or adaptations of other passenger fittings, not otherwise provided for
    • B60N3/04—Arrangements or adaptations of other passenger fittings, not otherwise provided for of floor mats or carpets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
    • B62J25/00—Foot-rests; Knee grips; Passenger hand-grips
    • B62J25/04—Floor-type foot rests
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14065—Positioning or centering articles in the mould
    • B29C2045/14122—Positioning or centering articles in the mould using fixed mould wall projections for centering the insert
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14065—Positioning or centering articles in the mould
    • B29C2045/14147—Positioning or centering articles in the mould using pins or needles penetrating through the insert
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B29L2031/3005—Body finishings

Description

本発明は、インサート成形部品及びインサート成形部品の製造方法に関する。   The present invention relates to an insert molded part and a method for manufacturing the insert molded part.

従来、スクータ型の自動二輪車等においては、乗員が足を置くフロア上に、滑り止め機能を有するゴム等のステップフロア部材が設けられる。例えば特許文献１には、ポリプロピレン製のフロアパネルを金型で成形する際、予め所定の形状に切り出したポリプロピレンシートのフロアマットを金型内の所定位置に位置決めセットすることで、フロアマットとフロアパネルとが一体化された一体成形品を成形する技術が開示されている。この技術では、フロアパネルの足置部に全面的にフロアマットが一体形成される。   2. Description of the Related Art Conventionally, in a scooter type motorcycle or the like, a step floor member such as rubber having a non-slip function is provided on a floor on which an occupant puts his / her foot. For example, in Patent Document 1, when a polypropylene floor panel is molded with a mold, a floor mat of a polypropylene sheet cut out in a predetermined shape is positioned and set at a predetermined position in the mold, so that the floor mat and floor A technique for forming an integrally molded product in which a panel is integrated is disclosed. In this technique, the floor mat is integrally formed on the entire surface of the footrest portion of the floor panel.

特開２０００−１５３７９２号公報JP 2000-153792 A

ところで、自動二輪車等においては、ステップフロア部材は外部に露出する部材であるため、乗員の個性に合わせて適宜ステップフロア部材の形状及びカラー等を変更したいという要望が強い。そして、意匠的嗜好性からも、ステップフロア部材をゴムだけで形成したものでなく、板状の他部材（ベース部材）を組み合わせるとともに、該他部材の表面を部分的に外部に露出させるようなステップフロア部材も望まれている。   By the way, in a motorcycle or the like, since the step floor member is a member exposed to the outside, there is a strong demand to change the shape, color, and the like of the step floor member as appropriate in accordance with the individuality of the occupant. And from the viewpoint of the design preference, the step floor member is not only made of rubber, but is combined with a plate-like other member (base member) and the surface of the other member is partially exposed to the outside. Step floor members are also desired.

このようなステップフロア部材は、ベース部材を被覆するようにゴム等の被覆部材を一体的に形成するインサート成形部品とすることが考えられる。この場合、被覆部材にベース部材を露出させる開口部を形成するには、インサート成形時に金型の開口形成部をベース部材の表面に密着させ、開口部を形成する領域に溶融樹脂が流れ込むことを阻止する方法がある。このとき、ベース部材の裏面側における被覆部材への影響、及び金型の密着力によるベース部材の反りの抑制等を考慮する必要がある。   Such a step floor member may be an insert-molded part that integrally forms a covering member such as rubber so as to cover the base member. In this case, in order to form an opening that exposes the base member to the covering member, the opening forming portion of the mold is brought into close contact with the surface of the base member during insert molding, and the molten resin flows into the region where the opening is formed. There is a way to stop it. At this time, it is necessary to consider the influence on the covering member on the back surface side of the base member and the suppression of the warpage of the base member due to the adhesion force of the mold.

そこで本発明は、板状のベース部材に被覆部材を一体的に形成するインサート成形部品及びその製造方法において、ベース部材の表面を部分的に露出させる開口部を被覆部材に形成しながら品質確保を容易にすることを目的とする。   Therefore, the present invention provides an insert molded part that integrally forms a covering member on a plate-like base member and a manufacturing method thereof, and ensures quality while forming an opening in the covering member that partially exposes the surface of the base member. The purpose is to make it easier.

上記課題の解決手段として、請求項１に記載した発明は、板状のベース部材（２６）と、前記ベース部材（２６）と一体的に形成される被覆部材（３１）と、を備えるインサート成形部品（２５）において、前記被覆部材（３１）における前記ベース部材（２６）の面直方向の一側には、前記ベース部材（２６）の表面（２６ｍ１）を露出させる開口部（３２ｂ）が形成され、前記被覆部材（３１）における前記面直方向の他側で前記開口部（３２ｂ）の裏側となる部位には、インサート成形時に前記ベース部材（２６）の裏面（２６ｍ２）を支持する成形時支持部（３６）が設けられ、前記ベース部材（２６）における表面（２６ｍ１）を前記被覆部材（３１）に覆われる部位には、インサート成形時に前記ベース部材（２６）を平面方向で位置決めする位置決め孔（２９）が形成されることを特徴とする。
請求項２に記載した発明は、板状のベース部材（２６）と、前記ベース部材（２６）と一体的に形成される被覆部材（３１）と、を備えるインサート成形車両部品（２５）において、前記被覆部材（３１）における前記ベース部材（２６）の面直方向の一側には、前記ベース部材（２６）の表面（２６ｍ１）を露出させる開口部（３２ｂ）が形成され、前記被覆部材（３１）における前記面直方向の他側で前記開口部（３２ｂ）の裏側となる部位には、インサート成形時に前記ベース部材（２６）の裏面（２６ｍ２）を支持する成形時支持部（３６）が設けられ、前記ベース部材（２６）における表面（２６ｍ１）を前記被覆部材（３１）に覆われる部位には、前記被覆部材（３１）の模様形状に沿ってベース開口部（２７）が形成されることを特徴とする。
請求項３に記載した発明は、板状のベース部材（２６）と、前記ベース部材（２６）と一体的に形成される被覆部材（３１）と、を備えるインサート成形車両部品（２５）において、前記被覆部材（３１）における前記ベース部材（２６）の面直方向の一側には、前記ベース部材（２６）の表面（２６ｍ１）を露出させる開口部（３２ｂ）が形成され、前記被覆部材（３１）における前記面直方向の他側で前記開口部（３２ｂ）の裏側となる部位には、インサート成形時に前記ベース部材（２６）の裏面（２６ｍ２）を支持する成形時支持部（３６）が設けられ、前記被覆部材（３１）における前記面直方向の他側で前記開口部（３２ｂ）の裏側となる部位には、前記成形時支持部（３６）を避けて、当該インサート成形車両部品（２５）を相手部品（２１）に取り付け可能とする突部（３７）が形成されることを特徴とする。 As a means for solving the above problems, the invention described in claim 1 is an insert molding comprising a plate-like base member (26) and a covering member (31) formed integrally with the base member (26). In the component (25), an opening (32b) that exposes the surface (26m1) of the base member (26) is formed on one side of the covering member (31) in the direction perpendicular to the base member (26). In the covering member (31), on the other side in the direction perpendicular to the surface, on the back side of the opening (32b), the back surface (26m2) of the base member (26) is supported at the time of insert molding. support (36) is provided, at a site covered surface (26M1) in said base member (26) to said cover member (31), said base member (26) the plane direction during insert molding With a positioning hole for positioning (29) is formed.
The invention described in claim 2 is an insert molded vehicle component (25) comprising a plate-like base member (26) and a covering member (31) formed integrally with the base member (26). An opening (32b) for exposing the surface (26m1) of the base member (26) is formed on one side of the covering member (31) in the direction perpendicular to the base member (26). 31), a support portion (36) at the time of molding that supports the back surface (26m2) of the base member (26) at the time of the insert molding at the other side in the direction perpendicular to the surface and the back side of the opening (32b). A base opening (27) is formed along the pattern shape of the covering member (31) at a portion where the surface (26m1) of the base member (26) is covered with the covering member (31). This The features.
The invention described in claim 3 is an insert molded vehicle part (25) comprising a plate-like base member (26) and a covering member (31) formed integrally with the base member (26). An opening (32b) for exposing the surface (26m1) of the base member (26) is formed on one side of the covering member (31) in the direction perpendicular to the base member (26). 31), a support portion (36) at the time of molding that supports the back surface (26m2) of the base member (26) at the time of the insert molding at the other side in the direction perpendicular to the surface and the back side of the opening (32b). The insert-molded vehicle component (31) is provided at a portion of the covering member (31) on the other side in the direction perpendicular to the surface and on the back side of the opening (32b), avoiding the molding support portion (36). 25) Wherein the projection to enable mounting in the hand piece (21) (37) is formed.

請求項４に記載した発明は、請求項１又は３に記載のインサート成形車両部品において、前記ベース部材（２６）における表面（２６ｍ１）を前記被覆部材（３１）に覆われる部位には、前記被覆部材（３１）の模様形状に沿ってベース開口部（２７）が形成されることを特徴とする。
請求項５に記載した発明は、請求項１又は２に記載のインサート成形車両部品において、前記被覆部材（３１）における前記面直方向の他側で前記開口部（３２ｂ）の裏側となる部位には、前記成形時支持部（３６）を避けて、当該インサート成形部品（２５）を相手部品（２１）に取り付け可能とする突部（３７）が形成されることを特徴とする。 According to a fourth aspect of the present invention, in the insert-molded vehicle part according to the first or third aspect, the surface (26m1) of the base member (26) is covered with the covering member (31). A base opening (27) is formed along the pattern shape of the member (31).
According to a fifth aspect of the present invention, in the insert-molded vehicle part according to the first or second aspect of the present invention, the part that is the back side of the opening (32b) on the other side in the direction perpendicular to the surface of the covering member (31). Is characterized in that a protrusion (37) is formed that allows the insert molded part (25) to be attached to the counterpart part (21), avoiding the molding support part (36).

請求項６に記載した発明は、金型（４０）における固定型（４１）と可動型（４２）とを型締めして成形空間（ＣＶ）を形成し、該成形空間（ＣＶ）内にセットした板状のベース部材（２６）に被覆部材（３１）を一体的に形成するインサート成形部品（２５）の製造方法において、前記被覆部材（３１）における前記ベース部材（２６）の面直方向の一側に、前記ベース部材（２６）の表面（２６ｍ１）を露出させる開口部（３２ｂ）を形成するべく、前記金型の開口形成部（４７）を前記ベース部材（２６）の表面（２６ｍ１）に密着させるとともに、前記ベース部材（２６）の面直方向の他側で前記開口部（３２ｂ）の裏側となる部位にて、前記ベース部材（２６）の裏面（２６ｍ２）を支持する面直方向位置決め工程（Ｓ３）と、前記ベース部材（２６）の表面（２６ｍ１）に前記開口形成部（４７）を密着させるとともに、前記開口部（３２ｂ）の裏側となる部位で前記ベース部材（２６）の裏面（２６ｍ２）を支持した状態で、前記固定型（４１）と前記可動型（４２）とを型締めして前記成形空間（ＣＶ）を形成する型締め工程（Ｓ４）と、前記成形空間（ＣＶ）内に被覆部材形成材料（Ｊ）を注入して前記被覆部材（３１）を形成する成形工程（Ｓ５）と、前記ベース部材（２６）における表面（２６ｍ１）を前記被覆部材（３１）に覆われる部位に形成された位置決め孔（２９）によって、前記ベース部材（２６）を平面方向で位置決めする平面方向位置決め工程（Ｓ２）と、を含むことを特徴とする。 According to the sixth aspect of the present invention, the fixed mold (41) and the movable mold (42) in the mold (40) are clamped to form a molding space (CV), and set in the molding space (CV). In the method of manufacturing an insert-molded part (25) in which the covering member (31) is integrally formed on the plate-shaped base member (26), the base member (26) in the direction perpendicular to the surface of the covering member (31) In order to form an opening (32b) exposing the surface (26m1) of the base member (26) on one side, the opening forming part (47) of the mold is formed on the surface (26m1) of the base member (26). In the direction perpendicular to the surface of the base member (26), and on the other side of the direction perpendicular to the surface of the base member (26) on the back side of the opening (32b). Positioning step (S3) and previous A state in which the opening forming portion (47) is brought into close contact with the surface (26m1) of the base member (26), and the back surface (26m2) of the base member (26) is supported at a portion on the back side of the opening (32b). A clamping process (S4) for clamping the fixed mold (41) and the movable mold (42) to form the molding space (CV), and a covering member forming material in the molding space (CV) A molding step (S5) for injecting (J) to form the covering member (31), and a positioning formed on a portion of the base member (26) where the surface (26m1) is covered with the covering member (31) A planar direction positioning step (S2) for positioning the base member (26) in the planar direction by the hole (29) .

請求項１，６に記載した発明によれば、ステップフロア部材のインサート成形時に、金型の開口形成部をベース部材に密着させる際にも、開口形成部がベース部材を押圧する力は、成形時支持部においてベース部材の裏側から直接的に支持される。このため、開口部を避けた位置に成形時支持部を設ける場合と比べて、開口形成部の密着力を確保してバリの発生等を抑えた上で、板状のベース部材の反り等を抑えることができる。また、最小限の成形時支持部で効率よくベース部材を支持可能となり、ベース部材裏側の支持痕を減らすとともに成形性の確保も容易にすることができる。
請求項１，６に記載した発明によれば、位置決め孔がベース部材の表面側で被覆部材に覆われるため、インサート成形部品の外観に位置決め孔が露出せず、インサート成形部品の外観への影響を抑えることができる。
請求項２，４に記載した発明によれば、ベース部材の表裏に渡って被覆部材を形成する場合にも、被覆部材形成材料の流れを良好にするとともに、被覆部材に弾性を持たせる場合にも、被覆部材の底付き感を抑えて弾性を高めることができる。
請求項３，５に記載した発明によれば、ベース部材における表面を被覆部材に覆われる部位にベース開口部が形成される構成では、該部位の裏面側に突部等が形成されると被覆部材の表面（意匠面）にヒケ等が生じ易くなる。一方、ベース部材により表側と遮断される開口部の裏側に相手部品への取り付け用の突部を設けることで、前記ベース開口部が形成されていても、ベース部材表側の被覆部材に前記突部の形成によるヒケ等が生じることを抑え、外観品質を高めることができる。

According to the first and sixth aspects of the present invention, when the step floor member is insert-molded, the force with which the opening forming portion presses the base member is also formed when the opening forming portion of the mold is brought into close contact with the base member. It is directly supported from the back side of the base member at the time support portion. For this reason, compared with the case where the molding support portion is provided at a position avoiding the opening portion, the adhesion of the opening forming portion is ensured to suppress the occurrence of burrs and the like, and the warpage of the plate-like base member is prevented. Can be suppressed. Further, the base member can be efficiently supported with the minimum support portion during molding, and the support traces on the back side of the base member can be reduced and the moldability can be easily ensured.
According to the first and sixth aspects of the invention, since the positioning hole is covered with the covering member on the surface side of the base member, the positioning hole is not exposed to the appearance of the insert molded part, and the influence on the appearance of the insert molded part is affected. Can be suppressed.
According to the invention described in claims 2 and 4 , when the covering member is formed across the front and back of the base member, the flow of the covering member forming material is improved and the covering member is provided with elasticity. However, it is possible to suppress the feeling of bottoming of the covering member and increase the elasticity.
According to the invention described in claim 3 and 5, coated with a configuration in which the base opening in a portion covered the surface of the base member to the covering member is formed, projections or the like on the back side of the site is formed Sinks or the like are likely to occur on the surface (design surface) of the member. On the other hand, even if the base opening is formed by providing a protrusion for attachment to the counterpart component on the back side of the opening that is blocked from the front side by the base member, the protrusion is formed on the covering member on the base member front side. It is possible to suppress the occurrence of sink marks or the like due to the formation of and improve the appearance quality.

本発明の実施形態における自動二輪車の左側面図である。1 is a left side view of a motorcycle according to an embodiment of the present invention. 図１のＩＩ矢視図である。It is II arrow directional view of FIG. 上記自動二輪車のステップフロア部材の斜視図である。Fig. 3 is a perspective view of a step floor member of the motorcycle. 上記ステップフロア部材の表側の平面図である。It is a top view of the front side of the said step floor member. 図４のＶ−Ｖ断面図である。It is VV sectional drawing of FIG. 図４のＶＩ−ＶＩ断面図である。It is VI-VI sectional drawing of FIG. 上記ステップフロア部材の裏側の平面図である。It is a top view of the back side of the said step floor member. 上記ステップフロア部材のインサート成形の手順を（ａ）〜（ｄ）の順に示す説明図である。It is explanatory drawing which shows the procedure of the insert molding of the said step floor member in order of (a)-(d). 上記ステップフロア部材の製造方法のフローチャート図である。It is a flowchart figure of the manufacturing method of the said step floor member.

以下、本発明の実施形態について図面を参照して説明する。なお、以下の説明における前後左右等の向きは、特に記載が無ければ以下に説明する車両における向きと同一とする。また以下の説明に用いる図中適所には、車両前方を示す矢印ＦＲ、車両左方を示す矢印ＬＨ、車両上方を示す矢印ＵＰが示されている。   Embodiments of the present invention will be described below with reference to the drawings. Note that the directions such as front, rear, left and right in the following description are the same as those in the vehicle described below unless otherwise specified. Further, in the drawings used for the following explanation, an arrow FR indicating the front of the vehicle, an arrow LH indicating the left side of the vehicle, and an arrow UP indicating the upper side of the vehicle are shown.

図１に示すスクータ型の自動二輪車（鞍乗り型車両）１は、バーハンドル２によって操向される前輪３と、スイングユニット９によって駆動される後輪４とを備える。バーハンドル２及び前輪３を含むステアリング系部品は、車体フレーム前端のヘッドパイプに操向可能に枢支される（何れも不図示）。車体フレームの下部後側には、スイングユニット９の前部下側が上下揺動可能に枢支される。車体フレームの上部後側には、乗車用の鞍乗りシート５が支持される。バーハンドル２とシート５との間には、比較的車高が低い跨ぎ部Ｍが設けられる。跨ぎ部Ｍの左右両側には、シート５に着座した乗員の足を載せる左右フロアステップ６が設けられる。左右フロアステップ６の間には、上方に凸の膨出形状をなして前後に延びるセンタートンネルＣＴが設けられる。   A scooter type motorcycle (saddle-type vehicle) 1 shown in FIG. 1 includes a front wheel 3 that is steered by a bar handle 2 and a rear wheel 4 that is driven by a swing unit 9. Steering system components including the bar handle 2 and the front wheel 3 are pivotally supported by the head pipe at the front end of the vehicle body frame (both not shown). On the lower rear side of the vehicle body frame, the front lower side of the swing unit 9 is pivotally supported so as to be vertically swingable. A saddle riding seat 5 for riding is supported on the upper rear side of the body frame. Between the bar handle 2 and the seat 5, a straddling portion M having a relatively low vehicle height is provided. Left and right floor steps 6 on which the occupant's feet seated on the seat 5 are placed are provided on the left and right sides of the straddling portion M. Between the left and right floor steps 6, there is provided a center tunnel CT having a convex bulge shape that extends upward and forward and backward.

自動二輪車１の車体を覆うカウリングは、前記ヘッドパイプ周りを前方から覆うフロントセンターカバー１１と、ヘッドパイプ周りを前外側方から覆う左右フロントサイドカバー１２と、ヘッドパイプ周りを後方から覆うとともにセンタートンネルＣＴの前部及び左右フットレスト２１を形成するフロントインナーカバー１３と、左右フロントサイドカバー１２の後下方に連なる左右フロアフロントカバー１４と、左右フロアフロントカバー１４の下部後方に連なる左右フロアサイドカバー１５と、フロントインナーカバー１３の下部後方に連なりセンタートンネルＣＴの後部上面を形成するセンターアッパーカバー１６と、フロントインナーカバー１３の下部後方に連なりセンタートンネルＣＴの後部側面を形成する左右センターサイドカバー１７と、センターアッパーカバー１６及び左右センターサイドカバー１７の後方に連なり車体後部を側方から覆う左右リヤサイドカバー１８と、を有する。左右フロアサイドカバー１５の上方には略水平な左右フロアステップ６が設けられる。   The cowling that covers the vehicle body of the motorcycle 1 includes a front center cover 11 that covers the periphery of the head pipe from the front, a left and right front side cover 12 that covers the periphery of the head pipe from the front outer side, and a center tunnel that covers the periphery of the head pipe from the rear. A front inner cover 13 that forms the front part of the CT and the left and right footrests 21; a left and right floor front cover 14 that continues to the lower rear of the left and right front side covers 12; and a left and right floor side cover 15 that continues to the lower rear of the left and right floor front covers 14 A center upper cover 16 that continues to the lower rear of the front inner cover 13 and forms the upper surface of the rear portion of the center tunnel CT, and a left and right center side cover that continues to the lower rear of the front inner cover 13 and forms the rear side surface of the center tunnel CT. Has a over 17, and left and right rear side covers 18 covering the rear portion of the vehicle body continuous to the rear of the center upper cover 16 and the left and right center side covers 17 from the side, a. A substantially horizontal left and right floor step 6 is provided above the left and right floor side covers 15.

図２を併せて参照し、左右フロアステップ６の前方には、上方に起立する立壁部２２を介して、前上がりに傾斜する平面状の左右フットレスト２１が設けられる。左右フットレスト２１は、それぞれの面直方向から見て、前後に長く前側ほど先細りとなる形状とされる。左右フットレスト２１には、本実施形態のインサート成形部品であるステップフロア部材２５がそれぞれ装着される。左右フットレスト２１及び左右ステップフロア部材２５は、それぞれ車体左右中心線ＣＬに対して左右対称の構成を有する。   Referring also to FIG. 2, in front of the left and right floor steps 6, planar left and right footrests 21 that are inclined forward and upward are provided via standing wall portions 22 that rise upward. The left and right footrests 21 have a shape that is longer in the front-rear direction and tapered toward the front side when viewed from the direction perpendicular to each surface. Step floor members 25, which are insert-molded parts of the present embodiment, are mounted on the left and right footrests 21, respectively. The left and right footrests 21 and the left and right step floor members 25 have a symmetrical configuration with respect to the vehicle body left and right center line CL, respectively.

フットレスト２１は、図２に示す面直方向視で、センタートンネルＣＴの下端縁６ｔに沿って前側が左右外側に位置するように斜めに延び、前部が左右外側へ湾曲する内側縁２１ａと、フロアフロントカバー１４の上端縁１４ｔに沿って前側が左右内側に位置するように斜めに延び、前部がさらに左右内側へ斜めに屈曲する外側縁２１ｂと、内外側縁２１ａ，２１ｂの後下端間に渡るように左右に延びる後端縁２１ｃと、を有する。   The footrest 21 extends obliquely so that the front side is located on the left and right outer sides along the lower end edge 6t of the center tunnel CT, as seen in the direction perpendicular to the plane shown in FIG. Along the upper edge 14t of the floor front cover 14, it extends diagonally so that the front side is located on the left and right inner sides, and the front edge further bends obliquely inwardly on the left and right sides, between the rear lower ends of the inner and outer edges 21a, 21b. And a rear end edge 21c that extends to the left and right so as to extend over the area.

図３、図４を併せて参照し、ステップフロア部材２５は、フットレスト２１に沿うように平板状に形成される。ステップフロア部材２５は、面直方向視でフットレスト２１よりも一回り小さい形状に設けられる。ステップフロア部材２５は、フットレスト２１の内側縁２１ａ、外側縁２１ｂ及び後端縁２１ｃにそれぞれ沿うように形成される部材内側縁２５ａ、部材外側縁２５ｂ及び部材後端縁２５ｃを有する。   3 and 4 together, the step floor member 25 is formed in a flat plate shape along the footrest 21. The step floor member 25 is provided in a shape that is slightly smaller than the footrest 21 when viewed in a plane direction. The step floor member 25 has a member inner edge 25a, a member outer edge 25b, and a member rear end edge 25c formed along the inner edge 21a, the outer edge 21b, and the rear end edge 21c of the footrest 21, respectively.

ステップフロア部材２５は、例えば平面状の鋼板を所定形状に切断して形成される平板状のベース部材２６と、例えばＥＰＤＭ（Ethylene Propylene Rubber）等の合成ゴムで形成されてベース部材２６の周囲を被覆するように一体的に形成される被覆部材３１（フロア部材）と、を備える。   The step floor member 25 is formed of, for example, a flat base member 26 formed by cutting a flat steel plate into a predetermined shape, and a synthetic rubber such as EPDM (Ethylene Propylene Rubber), and around the base member 26. Covering member 31 (floor member) integrally formed so as to cover.

ベース部材２６は、ステップフロア部材２５の厚さ方向（面直方向）から見て、さらに一回り小さい形状に形成される。ベース部材２６は、部材内側縁２５ａ、部材外側縁２５ｂ及び部材後端縁２５ｃにそれぞれ沿うように形成されるベース内側縁２６ａ、ベース外側縁２６ｂ及びベース後端縁２６ｃを有する。   The base member 26 is formed in a shape that is slightly smaller when viewed from the thickness direction (perpendicular direction) of the step floor member 25. The base member 26 has a base inner edge 26a, a base outer edge 26b, and a base rear edge 26c formed along the member inner edge 25a, the member outer edge 25b, and the member rear end edge 25c, respectively.

図４を参照し、ベース部材２６の表面２６ｍ１には、被覆部材３１における表側被覆部３２が一体的に設けられる。表側被覆部３２は、ステップフロア部材２５の面直方向視で軌跡幅を変化させつつＮ字形状を描くように延びる表内周被覆部３３を有する。ベース部材２６における表内周被覆部３３に覆われる部位には、表内周被覆部３３よりも一回り小さい形状のベース開口部２７が形成される。   Referring to FIG. 4, the front side covering portion 32 of the covering member 31 is integrally provided on the surface 26 m 1 of the base member 26. The front side covering portion 32 has a front inner peripheral covering portion 33 that extends so as to draw an N shape while changing the trajectory width when the step floor member 25 is viewed in the direction perpendicular to the plane. A base opening 27 having a shape slightly smaller than that of the front inner periphery covering portion 33 is formed at a portion of the base member 26 that is covered with the front inner periphery covering portion 33.

ベース開口部２７には、前記Ｎ字形状を描く軌跡の適宜個所を横断するように設けられる架設部２８が複数（例えば６つ）形成される。複数の架設部２８の内の一部（例えば３つ）には、架設部２８の幅よりも大きな径の円形状を形成するように拡幅部２８ａが形成される。拡幅部２８ａには、ステップフロア部材２５のインサート成形時に、被覆部材３１が形成されない素のベース部材２６をその面方向（平面方向）で位置決め可能とする位置決め孔２９（ロケート孔）が形成される。位置決め孔２９は、断面円形のロケートピン４５を整合、挿入させる円形状に形成される。位置決め孔２９及びロケートピン４５は、ベース部材２６の回転を規制するために複数設けられる。なお、ベース部材２６は湾曲又は屈曲等の形状を有してもよい。前記「面直方向」はインサート成形時の型割り方向、「平面方向」は「面直方向」と直交する方向に相当する。   The base opening 27 is formed with a plurality (for example, six) of erection portions 28 provided so as to cross an appropriate portion of the locus for drawing the N-shape. A widened portion 28 a is formed in a part (for example, three) of the plurality of erected portions 28 so as to form a circular shape having a diameter larger than the width of the erected portion 28. The widened portion 28a is formed with a positioning hole 29 (locating hole) that allows the base member 26, on which the covering member 31 is not formed, to be positioned in the surface direction (planar direction) during insert molding of the step floor member 25. . The positioning hole 29 is formed in a circular shape for aligning and inserting the locating pin 45 having a circular cross section. A plurality of positioning holes 29 and locating pins 45 are provided to restrict the rotation of the base member 26. The base member 26 may have a shape such as a curve or a bend. The “perpendicular direction” corresponds to a mold split direction during insert molding, and the “planar direction” corresponds to a direction orthogonal to the “perpendicular direction”.

図４〜図７を参照し、被覆部材３１は、ベース部材２６の表面２６ｍ１側に一体的に形成される表側被覆部３２と、ベース部材２６の裏面２６ｍ２側に一体的に形成される裏側被覆部３５と、を備える。   4 to 7, the covering member 31 includes a front side covering portion 32 integrally formed on the front surface 26 m 1 side of the base member 26 and a back side covering integrally formed on the back surface 26 m 2 side of the base member 26. Part 35.

表側被覆部３２は、ベース部材２６の外周縁に沿って一定幅で延びる表外周被覆部３４と、表外周被覆部３４の内周側に離間して形成される前記表内周被覆部３３と、を備える。表外周覆部及び表内周被覆部３３は、互いに面一かつベース部材２６の表面２６ｍ１と平行なステップ面３２ａ（踏み面、意匠面）を形成する。ステップフロア部材２５の表側における表外周被覆部３４及び表内周被覆部３３を避けた部位は、ベース部材２６の表面２６ｍ１を外部に露出させる開口部３２ｂとされる。   The front side covering portion 32 includes a front outer periphery covering portion 34 that extends with a constant width along the outer peripheral edge of the base member 26, and the front inner periphery covering portion 33 that is formed on the inner peripheral side of the front outer periphery covering portion 34. . The front outer periphery covering portion and the front inner periphery covering portion 33 form a step surface 32 a (step surface, design surface) that is flush with each other and parallel to the surface 26 m 1 of the base member 26. A portion of the front side of the step floor member 25 that avoids the front outer periphery covering portion 34 and the front inner periphery covering portion 33 is an opening 32b that exposes the surface 26m1 of the base member 26 to the outside.

表内周被覆部３３は、ベース部材２６の前部から後方へベース外側縁２６ｂの内周側に離間した位置をベース外側縁２６ｂと略平行に延びる第一延出部３３ａと、第一延出部３３ａの後端から前方かつ左右内側方へ斜めに延びる第二延出部３３ｂと、第二延出部３３ｂの前端から後方へベース外側縁２６ｂの内周側に離間した位置をベース内側縁２６ａと略平行に延びる第三延出部３３ｃと、を備える。第三延出部３３ｃの後部は、後側ほど末広がりとなる三角形状部３３ｄとされる。三角形状部３３ｄには、後側ほど左右外側に位置するように傾斜する凹溝３３ｅが複数形成される。   The front inner covering portion 33 includes a first extension portion 33a extending from the front portion of the base member 26 to the rear side toward the inner peripheral side of the base outer edge 26b and extending substantially parallel to the base outer edge 26b. A second extending portion 33b extending obliquely forward and laterally inward from the rear end of the protruding portion 33a, and a position spaced apart from the front end of the second extending portion 33b to the inner peripheral side of the base outer edge 26b are located inside the base. A third extending portion 33c extending substantially parallel to the edge 26a. The rear portion of the third extending portion 33c is a triangular portion 33d that expands toward the rear side. The triangular portion 33d is formed with a plurality of concave grooves 33e that are inclined so that the rear side is located on the left and right outer sides.

裏側被覆部３５は、ベース部材２６の裏面２６ｍ２を全面的に覆うように設けられる。裏側被覆部３５は、ベース部材２６の裏面２６ｍ２と平行な被覆裏面３５ａを形成する。裏側被覆部３５の外周部と表外周被覆部３４の外周部とは、ステップフロア部材２５の厚さ方向（面直方向）で互いに一体化される。ベース部材２６の外周部は、被覆部材３１の外周部に全周に渡って覆われる。   The back side covering portion 35 is provided so as to cover the entire back surface 26 m 2 of the base member 26. The back side covering portion 35 forms a covered back surface 35 a parallel to the back surface 26 m 2 of the base member 26. The outer peripheral part of the back side covering part 35 and the outer peripheral part of the front outer peripheral covering part 34 are integrated with each other in the thickness direction (perpendicular direction) of the step floor member 25. The outer peripheral portion of the base member 26 is covered by the outer peripheral portion of the covering member 31 over the entire periphery.

裏側被覆部３５において、開口部３２ｂの裏側となる部位には、インサート成形時にベース部材２６の裏面２６ｍ２を支持可能とする成形時支持部３６が設けられる。成形時支持部３６は、金型４０における後述する第一支持ピン４３の円柱状の先端部でベース部材２６の裏面２６ｍ２を当接支持することで形成される。成形時支持部３６は、面直方向視で円形をなし、ベース部材２６の裏面２６ｍ２をステップフロア部材２５の裏側に露出させる。成形時支持部３６は、開口部３２ｂの前後に二箇所ずつ、計四か所に設けられる。   In the back side covering portion 35, a portion on the back side of the opening 32b is provided with a molding support portion 36 that can support the back surface 26m2 of the base member 26 during insert molding. The molding support portion 36 is formed by abutting and supporting the back surface 26m2 of the base member 26 at a cylindrical tip portion of a first support pin 43 (described later) in the mold 40. The molding support portion 36 has a circular shape when viewed in the direction perpendicular to the surface, and exposes the back surface 26 m 2 of the base member 26 to the back side of the step floor member 25. The molding support portions 36 are provided at a total of four locations, two locations before and after the opening portion 32b.

表側被覆部３２におけるベース部材２６を露出させる開口部３２ｂは、インサート成形時に金型４０の開口形成部４７をベース部材２６の表面２６ｍ１に押し当てて密着させ、開口部３２ｂを形成する領域に溶融樹脂Ｊが流れ込まないようにすることで形成される。このとき、開口部３２ｂの周縁にバリを生じさせないためには、開口形成部４７をベース部材２６にしっかり密着させる必要がある。開口形成部４７をベース部材２６にしっかり密着させるためには、ベース部材２６を裏側から支持する必要があるが、このとき、ベース部材２６を支持する場所によっては、板状のベース部材２６を反らせたり裏側被覆部３５に種々の痕を付けたりすることがある。   The opening 32b that exposes the base member 26 in the front cover portion 32 is melted in a region where the opening 32b is formed by pressing the opening forming portion 47 of the mold 40 against the surface 26m1 of the base member 26 during insert molding. It is formed by preventing the resin J from flowing in. At this time, in order not to generate burrs at the periphery of the opening 32b, the opening forming portion 47 needs to be firmly attached to the base member 26. In order to firmly attach the opening forming portion 47 to the base member 26, it is necessary to support the base member 26 from the back side. At this time, depending on the place where the base member 26 is supported, the plate-like base member 26 is warped. In some cases, the backside covering portion 35 may have various marks.

これに対し、本実施形態では、開口部３２ｂの裏側となる部位にベース部材２６の裏面２６ｍ２を支持する成形時支持部３６を設けている。これにより、ステップフロア部材２５のインサート成形時に、金型４０の開口形成部４７をベース部材２６に密着させる際にも、開口形成部４７がベース部材２６を押圧する力は、成形時支持部３６においてベース部材２６の裏側から直接的に支持される。このため、開口部３２ｂ（開口形成部４７）を避けた位置に成形時支持部３６（第一支持ピン４３）を設ける場合と比べて、開口形成部４７の密着力を確保してバリの発生等を抑えた上で、板状のベース部材２６の反り等を抑えることができる。また、最小限の成形時支持部３６で効率よくベース部材２６を支持可能となり、ベース部材２６裏側の支持痕を減らすとともに成形性の確保も容易にすることができる。   On the other hand, in the present embodiment, a molding support portion 36 that supports the back surface 26m2 of the base member 26 is provided at a site on the back side of the opening 32b. As a result, when the step floor member 25 is insert-molded, even when the opening forming portion 47 of the mold 40 is brought into close contact with the base member 26, the force with which the opening forming portion 47 presses the base member 26 is the supporting portion 36 during molding. In FIG. 4, the base member 26 is directly supported from the back side. For this reason, as compared with the case where the molding support portion 36 (first support pin 43) is provided at a position avoiding the opening portion 32b (opening formation portion 47), the adhesion of the opening formation portion 47 is ensured and burrs are generated. In addition, the warpage of the plate-like base member 26 can be suppressed. Further, the base member 26 can be efficiently supported by the minimum support portion 36 at the time of molding, and the support traces on the back side of the base member 26 can be reduced and the moldability can be easily ensured.

裏側被覆部３５における開口部３２ｂの裏側でかつ成形時支持部３６を避けた部位には、ステップフロア部材２５をフットレスト２１に取り付け可能とする突部３７が複数形成される。
図５を参照し、突部３７は、ステップフロア部材２５の面直方向に沿う円柱状の基部３７ａと、基部３７ａの先端部に拡径して連なる傘部３７ｂと、を備える。傘部３７ｂは、先端側に向けて開放するカップ状（中空状）をなし、フットレスト２１の係止孔（不図示）に縮径するように弾性変形しつつ差し込まれて係止される。これら複数の突部３７により、ステップフロア部材２５がフットレスト２１に取り付けられる。
裏側被覆部３５における突部３７を形成する部位の被覆裏面３５ａには、突部３７よりもやや大径の範囲をベース部材２６側に浅く変位させる基端凹部３８が形成される。これにより、突部３７の基端の隅部に形成されるフィレット面が前記係止孔の周縁に干渉し難くなる。 A plurality of protrusions 37 that allow the step floor member 25 to be attached to the footrest 21 are formed on the back side covering portion 35 on the back side of the opening portion 32b and avoiding the support portion 36 during molding.
Referring to FIG. 5, the protrusion 37 includes a columnar base portion 37 a that extends along the perpendicular direction of the step floor member 25, and an umbrella portion 37 b that expands and continues to the distal end portion of the base portion 37 a. The umbrella portion 37b has a cup shape (hollow shape) that opens toward the distal end side, and is inserted and locked while being elastically deformed so as to reduce in diameter to a locking hole (not shown) of the footrest 21. The step floor member 25 is attached to the footrest 21 by the plurality of protrusions 37.
A base end concave portion 38 is formed on the covered back surface 35 a of the back side covering portion 35 where the protrusion 37 is formed, and the range of a slightly larger diameter than the protrusion 37 is shallowly displaced toward the base member 26. Thereby, the fillet surface formed at the corner of the base end of the protrusion 37 is less likely to interfere with the peripheral edge of the locking hole.

図８に示すように、ステップフロア部材２５を形成する金型４０（成形型）は、図中下側に位置する固定型４１と、図中上側に位置する可動型４２と、を備える。図示都合上、固定型４１を下型、可動型４２を上型として示すが、これらが上下逆でもよく、かつ上下方向とは異なる水平方向等で接近離反する構成でもよい。   As shown in FIG. 8, a mold 40 (molding die) for forming the step floor member 25 includes a fixed die 41 located on the lower side in the drawing and a movable die 42 located on the upper side in the drawing. For convenience of illustration, the fixed mold 41 is shown as a lower mold and the movable mold 42 is shown as an upper mold. However, these may be upside down, and may be configured to approach and separate in a horizontal direction or the like different from the vertical direction.

金型４０は、固定型４１に可動型４２を接近させてこれらを型締め状態とし、この状態で金型４０内部に成形空間ＣＶを形成する。金型４０は、成形空間ＣＶ内にベース部材２６をセットし、このベース部材２６の周囲に被覆部材３１を一体的に形成可能とする。   In the mold 40, the movable mold 42 is brought close to the fixed mold 41 so as to be clamped, and in this state, a molding space CV is formed inside the mold 40. In the mold 40, the base member 26 is set in the molding space CV, and the covering member 31 can be integrally formed around the base member 26.

例えば固定型４１（下型）には、ベース部材２６の裏面２６ｍ２（下面）に先端面（上端面）を当接させる円柱状の支持ピンが複数立設される。
図６を併せて参照し、複数の支持ピンは、ベース部材２６における被覆部材３１の開口部３２ｂを形成する部位の裏面２６ｍ２に先端面４３ａを当接させる第一支持ピン４３と、ベース部材２６における被覆部材３１に覆われる部位の裏面２６ｍ２に先端面４４ａを当接させるとともにベース部材２６に形成される位置決め孔２９に先端突部（ロケートピン４５）を整合状態で挿入する第二支持ピン４４と、に分別される。 For example, the fixed die 41 (lower die) is provided with a plurality of columnar support pins that abut the front end surface (upper end surface) on the back surface 26m2 (lower surface) of the base member 26.
Referring also to FIG. 6, the plurality of support pins include a first support pin 43 that abuts the front end surface 43 a on the back surface 26 m 2 of the portion of the base member 26 that forms the opening 32 b of the covering member 31, and the base member 26. A second support pin 44 for bringing the front end surface 44a into contact with the back surface 26m2 of the portion covered with the covering member 31 and inserting the front end protrusion (locating pin 45) into the positioning hole 29 formed in the base member 26 in an aligned state. , Will be sorted.

係る構成において、フロアステップ部材２５を製造する際の工程について図８、図９を参照して説明する。
まず、図８（ａ）、図９を参照し、固定型４１に対して可動型４２が離間した型開き状態にあるときに、ベース部材２６を金型４０内の所定位置に略水平に搬入する（ベース部材搬入工程Ｓ１）。
次に、ベース部材２６の複数の位置決め孔２９に、固定型４１の複数の第二支持ピン４４のロケートピン４５を、それぞれ整合状態で挿入する（平面方向位置決め工程Ｓ２）。これにより、ベース部材２６の水平方向（平面方向）での位置決めがなされる。 In this configuration, a process for manufacturing the floor step member 25 will be described with reference to FIGS.
First, referring to FIG. 8A and FIG. 9, when the movable mold 42 is in an open state in which the movable mold 42 is separated from the fixed mold 41, the base member 26 is carried into a predetermined position in the mold 40 substantially horizontally. (Base member loading step S1).
Next, the locating pins 45 of the plurality of second support pins 44 of the fixed die 41 are inserted into the plurality of positioning holes 29 of the base member 26 in an aligned state (planar direction positioning step S2). As a result, the base member 26 is positioned in the horizontal direction (plane direction).

図６を併せて参照し、ロケートピン４５は、例えば段付き形状の第二支持ピン４４の先端部（上端部）に設けられる。第二支持ピン４４は、ロケートピン４５の基端外周にベース部材２６の裏面２６ｍ２に当接可能な段差面（先端面４４ａ）を形成する。固定型４１における第二支持ピン４４を避けた部位には、ベース部材２６の裏面２６ｍ２に先端面４３ａを当接可能な第一支持ピン４３が配置される。   Referring also to FIG. 6, the locate pin 45 is provided at the tip (upper end) of the stepped second support pin 44, for example. The second support pin 44 forms a step surface (tip surface 44 a) that can contact the rear surface 26 m 2 of the base member 26 on the outer periphery of the base end of the locate pin 45. A first support pin 43 capable of abutting the front end surface 43 a on the back surface 26 m 2 of the base member 26 is disposed at a portion of the fixed mold 41 that is away from the second support pin 44.

図８（ｂ）、図９を参照し、平面方向位置決め工程Ｓ２でベース部材２６を平面方向で位置決めした状態で、可動型４２を固定型４１に接近させる。可動型４２には、被覆部材３１の開口部３２ｂと同形状の密着部を有する開口形成部４７が設けられる。開口形成部４７は、ベース部材２６の表面２６ｍ１（上面）に開口形成部４７を当接、密着させ、該密着部分に溶融樹脂Ｊが流れ込むことを阻止して被覆部材３１の開口部３２ｂを形成する。
上記のように可動型４２を固定型４１に接近させると、可動型４２の開口形成部４７と固定型４１の第一支持ピン４３とでベース部材２６が挟み込まれる（面直方向位置決め工程Ｓ３）。これにより、ベース部材２６の上下方向（面直方向）での位置決めがなされる。 With reference to FIG. 8B and FIG. 9, the movable mold 42 is moved closer to the fixed mold 41 in a state where the base member 26 is positioned in the planar direction in the planar direction positioning step S <b> 2. The movable mold 42 is provided with an opening forming portion 47 having a close contact portion having the same shape as the opening 32 b of the covering member 31. The opening forming portion 47 abuts and closely contacts the opening forming portion 47 with the surface 26m1 (upper surface) of the base member 26, and prevents the molten resin J from flowing into the contacting portion to form the opening 32b of the covering member 31. To do.
When the movable mold 42 is brought close to the fixed mold 41 as described above, the base member 26 is sandwiched between the opening forming portion 47 of the movable mold 42 and the first support pin 43 of the fixed mold 41 (surface direction direction positioning step S3). . As a result, the base member 26 is positioned in the vertical direction (perpendicular direction).

面直方向位置決め工程Ｓ３では、開口形成部４７をベース部材２６の表面２６ｍ１に所定の力で密着させるが、その力は、ベース部材２６の裏面２６ｍ２側から第一支持ピン４３により直接的に支持される。このため、開口形成部４７の密着力を十分に稼いで開口部３２ｂのバリの発生等が抑えられるとともに、前記密着力によるベース部材２６の撓み等が抑えられる。すなわち、開口形成部４７と支持ピンとがベース部材２６を挟んで対向するので、開口形成部４７と支持ピンとで挟み込んだベース部材２６の曲げ及びせん断応力の発生が抑えられる。   In the perpendicular direction positioning step S3, the opening forming portion 47 is brought into close contact with the front surface 26m1 of the base member 26 with a predetermined force, but the force is directly supported by the first support pin 43 from the back surface 26m2 side of the base member 26. Is done. For this reason, the contact force of the opening forming portion 47 can be sufficiently increased to suppress the occurrence of burrs in the opening portion 32b, and the bending of the base member 26 due to the contact force can be suppressed. That is, since the opening forming portion 47 and the support pin are opposed to each other with the base member 26 interposed therebetween, the occurrence of bending and shear stress of the base member 26 sandwiched between the opening forming portion 47 and the support pin can be suppressed.

本実施形態では、面直方向位置決め工程Ｓ３において、第二支持ピン４４の段差面（先端面４４ａ）がベース部材２６の下面（裏面２６ｍ２）に当接したままであるが、前記段差面がベース部材２６から離間する構成でもよい。第二支持ピン４４の段差面がベース部材２６の下面に当接する部位（拡幅部２８ａ）は、インサート成形時にベース部材２６の裏面２６ｍ２を支持する第二成形時支持部３６ａとされる。   In the present embodiment, the step surface (front end surface 44a) of the second support pin 44 remains in contact with the lower surface (back surface 26m2) of the base member 26 in the surface perpendicular direction positioning step S3. The structure separated from the member 26 may be sufficient. A portion (widened portion 28a) where the stepped surface of the second support pin 44 contacts the lower surface of the base member 26 is a second molding support portion 36a that supports the back surface 26m2 of the base member 26 during insert molding.

ベース部材２６を平面方向及び面直方向で位置決めした状態で、固定型４１及び可動型４２が所定の型締め力で閉じる（型締め工程Ｓ４）。これにより、金型４０内にキャビティ（成形空間ＣＶ）が形成される。
図８（ｃ）、図９を参照し、キャビティＣＶ内には、例えば固定型４１に設けた流路４６を介して被覆部材形成材料Ｊ（溶融樹脂）が射出注入され、ベース部材２６の周囲に被覆部材３１を形作る。この被覆部材形成材料Ｊを冷却、凝固させることで、一体のフロアステップ部材２５が形成される（成形工程Ｓ５）。
図８（ｄ）、図９を参照し、成形工程Ｓ５の後、金型４０を開いて製品を金型４０内から取り出すことで（製品取り出し工程Ｓ６）、ステップフロア部材２５の製造が完了する。 In a state where the base member 26 is positioned in the plane direction and the direction perpendicular to the plane, the fixed mold 41 and the movable mold 42 are closed with a predetermined mold clamping force (mold clamping step S4). Thereby, a cavity (molding space CV) is formed in the mold 40.
With reference to FIGS. 8C and 9, for example, the covering member forming material J (molten resin) is injected and injected into the cavity CV through the flow path 46 provided in the fixed mold 41. The covering member 31 is formed. By cooling and solidifying the covering member forming material J, an integral floor step member 25 is formed (molding step S5).
With reference to FIG. 8D and FIG. 9, after the molding step S5, the mold 40 is opened and the product is taken out from the die 40 (product taking-out step S6), whereby the manufacture of the step floor member 25 is completed. .

以上説明したように、上記実施形態におけるインサート成形部品及びその製造方法によれば、インサート成形時、ベース部材２６の表面２６ｍ１に金型４０の開口形成部４７を密着させるとともに、開口部３２ｂの裏側となる部位でベース部材２６の裏面２６ｍ２を支持することで、開口形成部４７の密着力を確保してバリの発生等を抑えた上で、板状のベース部材２６の反り等を抑えることができる。また、最小限の成形時支持部３６で効率よくベース部材２６を支持可能となり、ベース部材２６裏側の支持痕を減らすとともに成形性の確保も容易にすることができる。
このように、板状のベース部材２６に被覆部材３１を一体的に形成するインサート成形部品において、ベース部材２６の表面２６ｍ１を部分的に露出させる開口部３２ｂを被覆部材３１に形成して斬新な外観としながら、バリ及び反りの発生等を抑えて品質確保を容易にすることができる。 As described above, according to the insert molded component and the manufacturing method thereof in the above embodiment, the opening forming portion 47 of the mold 40 is brought into close contact with the surface 26m1 of the base member 26 and the back side of the opening 32b. By supporting the back surface 26m2 of the base member 26 at a portion that becomes, it is possible to suppress the warpage of the plate-like base member 26, etc., while ensuring the adhesion of the opening forming portion 47 and suppressing the occurrence of burrs and the like. it can. Further, the base member 26 can be efficiently supported by the minimum support portion 36 at the time of molding, and the support traces on the back side of the base member 26 can be reduced and the moldability can be easily ensured.
In this way, in the insert-molded part in which the covering member 31 is integrally formed on the plate-like base member 26, the opening 32b that partially exposes the surface 26m1 of the base member 26 is formed in the covering member 31 and is novel. While maintaining the appearance, the generation of burrs and warpage can be suppressed to ensure quality.

また、ベース部材２６における表面２６ｍ１を被覆部材３１に覆われる部位に設けた位置決め孔２９によって、インサート成形時にベース部材２６の平面方向の位置決めを行うので、位置決め孔２９がベース部材２６の表面２６ｍ１側すなわちステップフロア部材２５の意匠面側に露出せず、ステップフロア部材２５の外観への影響を抑えることができる。また、ベース部材２６の外周部で位置決めを行う構成に比して、ベース部材２６の外周の全周を被覆部材３１で容易に覆うことができる。   Further, since the base member 26 is positioned in the planar direction during insert molding by the positioning hole 29 provided in the portion covered with the covering member 31 on the surface 26m1 of the base member 26, the positioning hole 29 is located on the surface 26m1 side of the base member 26. That is, the influence on the external appearance of the step floor member 25 can be suppressed without being exposed to the design surface side of the step floor member 25. Further, the entire circumference of the outer periphery of the base member 26 can be easily covered with the covering member 31 as compared with the configuration in which positioning is performed at the outer periphery of the base member 26.

また、ベース部材２６における表面２６ｍ１を被覆部材３１の表内周被覆部３３に覆われる部位には、表内周被覆部３３の模様形状に沿ってベース開口部２７が形成されるので、ベース部材２６の表裏に渡って被覆部材３１を形成する場合にも、被覆部材形成材料Ｊの流れを良好にするとともに、被覆部材３１をゴム等の弾性材料で形成する等により被覆部材３１に弾性を持たせる場合にも、ベース開口部２７が無い場合に比して被覆部材３１の底付き感が抑えられ、厚さを抑えつつも弾性の高いステップフロア部材２５を構成することができる。   Further, since the base opening 26 is formed along the pattern shape of the front inner periphery covering portion 33 at a portion of the base member 26 where the surface 26m1 is covered by the front inner periphery covering portion 33 of the covering member 31, the base member Even when the covering member 31 is formed across the front and back surfaces of the cover member 26, the covering member 31 has elasticity by making the covering member forming material J flow better and forming the covering member 31 with an elastic material such as rubber. Even in the case where the base opening 27 is not provided, the feeling of bottoming of the covering member 31 is suppressed as compared with the case where the base opening 27 is not provided, and the step floor member 25 having high elasticity can be configured while suppressing the thickness.

また、被覆部材３１の裏側被覆部３５における開口部３２ｂの裏側で成形時支持部３６を避けた部位に、ステップフロア部材２５をフットレスト２１に取り付けるための突部３７が形成されるので、ベース開口部２７が形成されていても、表内周被覆部３３に突部３７の形成によるヒケ等が生じることを抑え、外観品質を容易に確保することができる。   Further, since a protrusion 37 for attaching the step floor member 25 to the footrest 21 is formed at a portion of the back side covering portion 35 of the covering member 31 on the back side of the opening portion 32b and avoiding the molding support portion 36, the base opening Even if the portion 27 is formed, it is possible to suppress the occurrence of sink marks or the like due to the formation of the protrusion 37 in the inner surface covering portion 33, and to easily ensure the appearance quality.

なお、本発明は上記実施形態に限られるものではなく、例えば、第二支持ピン４４は先端面４４ａ（段差面）を形成する段付きピンであるが、先端面を形成しない（ベース部材２６を面直方向で支持しない）構成としてもよい。そして、スクータ型の自動二輪車のステップフロア部材への適用に限らず、三輪又は四輪も含む様々な車両部品への適用を始め、種々のインサート成形部品への適用が可能である。   The present invention is not limited to the above-described embodiment. For example, the second support pin 44 is a stepped pin that forms a tip surface 44a (step surface), but does not form the tip surface (the base member 26). It is good also as a structure which is not supported in a perpendicular direction. And it is applicable not only to the step floor member of a scooter type motorcycle but also to various insert molded parts, including application to various vehicle parts including three or four wheels.

１ 自動二輪車
２１ フットレスト（相手部品）
２５ ステップフロア部材（インサート成形部品）
２６ ベース部材
２６ｍ１ 表面
２６ｍ２ 裏面
２７ ベース開口部
２９ 位置決め孔
３１ 被覆部材
３２ｂ 開口部
３６ 成形時支持部
３７ 突部
４０ 金型
４１ 固定型
４２ 可動型
４７ 開口形成部
ＣＶ 成形空間
Ｓ２ 平面方向位置決め工程
Ｓ３ 面直方向位置決め工程
Ｓ４ 型締め工程
Ｓ５ 成形工程 1 Motorcycle 21 Footrest (parts)
25 Step floor material (insert molding part)
26 Base member 26m1 Front surface 26m2 Back surface 27 Base opening 29 Positioning hole 31 Cover member 32b Opening portion 36 Molding support portion 37 Protrusion 40 Mold 41 Fixed die 42 Movable die 47 Opening formation portion CV Molding space S2 Planar direction positioning step S3 Straight direction positioning process S4 Clamping process S5 Molding process

Claims (6)

板状のベース部材（２６）と、前記ベース部材（２６）と一体的に形成される被覆部材（３１）と、を備えるインサート成形車両部品（２５）において、
前記被覆部材（３１）における前記ベース部材（２６）の面直方向の一側には、前記ベース部材（２６）の表面（２６ｍ１）を露出させる開口部（３２ｂ）が形成され、
前記被覆部材（３１）における前記面直方向の他側で前記開口部（３２ｂ）の裏側となる部位には、インサート成形時に前記ベース部材（２６）の裏面（２６ｍ２）を支持する成形時支持部（３６）が設けられ、
前記ベース部材（２６）における表面（２６ｍ１）を前記被覆部材（３１）に覆われる部位には、インサート成形時に前記ベース部材（２６）を平面方向で位置決めする位置決め孔（２９）が形成されることを特徴とするインサート成形車両部品。 In an insert molded vehicle part (25) comprising a plate-like base member (26) and a covering member (31) formed integrally with the base member (26),
An opening (32b) that exposes the surface (26m1) of the base member (26) is formed on one side of the covering member (31) in the direction perpendicular to the base member (26).
In the covering member (31), on the other side in the direction perpendicular to the surface, on the back side of the opening (32b), a support portion during molding that supports the back surface (26m2) of the base member (26) during insert molding. (36) is provided ,
A positioning hole (29) for positioning the base member (26) in a planar direction at the time of insert molding is formed in a portion of the base member (26) where the surface (26m1) is covered with the covering member (31). Insert molded vehicle parts characterized by. 板状のベース部材（２６）と、前記ベース部材（２６）と一体的に形成される被覆部材（３１）と、を備えるインサート成形車両部品（２５）において、
前記被覆部材（３１）における前記ベース部材（２６）の面直方向の一側には、前記ベース部材（２６）の表面（２６ｍ１）を露出させる開口部（３２ｂ）が形成され、
前記被覆部材（３１）における前記面直方向の他側で前記開口部（３２ｂ）の裏側となる部位には、インサート成形時に前記ベース部材（２６）の裏面（２６ｍ２）を支持する成形時支持部（３６）が設けられ、
前記ベース部材（２６）における表面（２６ｍ１）を前記被覆部材（３１）に覆われる部位には、前記被覆部材（３１）の模様形状に沿ってベース開口部（２７）が形成されることを特徴とするインサート成形車両部品。 In an insert molded vehicle part (25) comprising a plate-like base member (26) and a covering member (31) formed integrally with the base member (26),
An opening (32b) that exposes the surface (26m1) of the base member (26) is formed on one side of the covering member (31) in the direction perpendicular to the base member (26).
In the covering member (31), on the other side in the direction perpendicular to the surface, on the back side of the opening (32b), a support portion during molding that supports the back surface (26m2) of the base member (26) during insert molding. (36) is provided,
A base opening (27) is formed at a portion of the base member (26) where the surface (26m1) is covered with the covering member (31) along the pattern shape of the covering member (31). insert molding a vehicle component to. 板状のベース部材（２６）と、前記ベース部材（２６）と一体的に形成される被覆部材（３１）と、を備えるインサート成形車両部品（２５）において、
前記被覆部材（３１）における前記ベース部材（２６）の面直方向の一側には、前記ベース部材（２６）の表面（２６ｍ１）を露出させる開口部（３２ｂ）が形成され、
前記被覆部材（３１）における前記面直方向の他側で前記開口部（３２ｂ）の裏側となる部位には、インサート成形時に前記ベース部材（２６）の裏面（２６ｍ２）を支持する成形時支持部（３６）が設けられ、
前記被覆部材（３１）における前記面直方向の他側で前記開口部（３２ｂ）の裏側となる部位には、前記成形時支持部（３６）を避けて、当該インサート成形車両部品（２５）を相手部品（２１）に取り付け可能とする突部（３７）が形成されることを特徴とするインサート成形車両部品。 In an insert molded vehicle part (25) comprising a plate-like base member (26) and a covering member (31) formed integrally with the base member (26),
An opening (32b) that exposes the surface (26m1) of the base member (26) is formed on one side of the covering member (31) in the direction perpendicular to the base member (26).
In the covering member (31), on the other side in the direction perpendicular to the surface, on the back side of the opening (32b), a support portion during molding that supports the back surface (26m2) of the base member (26) during insert molding. (36) is provided,
The insert-molded vehicle part (25) is disposed on the other side of the covering member (31) on the other side in the direction perpendicular to the plane and behind the opening (32b), avoiding the molding support (36). An insert-molded vehicle part characterized in that a projection (37) that can be attached to the counterpart part (21) is formed. 前記ベース部材（２６）における表面（２６ｍ１）を前記被覆部材（３１）に覆われる部位には、前記被覆部材（３１）の模様形状に沿ってベース開口部（２７）が形成されることを特徴とする請求項１又は３に記載のインサート成形車両部品。 A base opening (27) is formed at a portion of the base member (26) where the surface (26m1) is covered with the covering member (31) along the pattern shape of the covering member (31). The insert molded vehicle part according to claim 1 or 3 . 前記被覆部材（３１）における前記面直方向の他側で前記開口部（３２ｂ）の裏側となる部位には、前記成形時支持部（３６）を避けて、当該インサート成形車両部品（２５）を相手部品（２１）に取り付け可能とする突部（３７）が形成されることを特徴とする請求項１又は２に記載のインサート成形車両部品。 The insert-molded vehicle part (25) is disposed on the other side of the covering member (31) on the other side in the direction perpendicular to the plane and behind the opening (32b), avoiding the molding support (36). The insert-molded vehicle part according to claim 1 or 2, wherein a protrusion (37) that can be attached to the mating part (21) is formed. 金型（４０）における固定型（４１）と可動型（４２）とを型締めして成形空間（ＣＶ）を形成し、該成形空間（ＣＶ）内にセットした板状のベース部材（２６）に被覆部材（３１）を一体的に形成するインサート成形車両部品（２５）の製造方法において、
前記被覆部材（３１）における前記ベース部材（２６）の面直方向の一側に、前記ベース部材（２６）の表面（２６ｍ１）を露出させる開口部（３２ｂ）を形成するべく、前記金型の開口形成部（４７）を前記ベース部材（２６）の表面（２６ｍ１）に密着させるとともに、前記ベース部材（２６）の面直方向の他側で前記開口部（３２ｂ）の裏側となる部位にて、前記ベース部材（２６）の裏面（２６ｍ２）を支持する面直方向位置決め工程（Ｓ３）と、
前記ベース部材（２６）の表面（２６ｍ１）に前記開口形成部（４７）を密着させるとともに、前記開口部（３２ｂ）の裏側となる部位で前記ベース部材（２６）の裏面（２６ｍ２）を支持した状態で、前記固定型（４１）と前記可動型（４２）とを型締めして前記成形空間（ＣＶ）を形成する型締め工程（Ｓ４）と、
前記成形空間（ＣＶ）内に被覆部材形成材料（Ｊ）を注入して前記被覆部材（３１）を形成する成形工程（Ｓ５）と、
前記ベース部材（２６）における表面（２６ｍ１）を前記被覆部材（３１）に覆われる部位に形成された位置決め孔（２９）によって、前記ベース部材（２６）を平面方向で位置決めする平面方向位置決め工程（Ｓ２）と、を含むことを特徴とするインサート成形車両部品の製造方法。 The fixed mold (41) and the movable mold (42) in the mold (40) are clamped to form a molding space (CV), and a plate-like base member (26) set in the molding space (CV) In the manufacturing method of the insert-molded vehicle part (25) in which the covering member (31) is integrally formed with
In order to form an opening (32b) exposing the surface (26m1) of the base member (26) on one side of the covering member (31) in the direction perpendicular to the base member (26), The opening forming part (47) is brought into close contact with the surface (26m1) of the base member (26), and at the other side of the base member (26) in the direction perpendicular to the surface, on the back side of the opening (32b). , A surface perpendicular direction positioning step (S3) for supporting the back surface (26m2) of the base member (26);
The opening forming portion (47) is brought into close contact with the surface (26m1) of the base member (26), and the back surface (26m2) of the base member (26) is supported at a portion on the back side of the opening (32b). A mold clamping step (S4) in which the fixed mold (41) and the movable mold (42) are clamped to form the molding space (CV);
A molding step (S5) for injecting a coating member forming material (J) into the molding space (CV) to form the coating member (31);
A planar positioning step of positioning the base member (26) in the planar direction by a positioning hole (29) formed in a portion of the base member (26) where the surface (26m1) is covered with the covering member (31). S2), and a method for manufacturing an insert molded vehicle part.
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